Hot-Air Quarantine Treatment for Carambolas Infested with Caribbean Fruit Fly (Diptera: Tephritidae)

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A single-stage quarantine treatment using air at 47 ± 0.2°C was developed to disinfest Florida-grown carambola, Averrhoa carambola L., 'Arkin' of eggs and larvae of Caribbean fruit fly, Anastrepha suspensa (Loew). Treating infested fruits for 30,45, and 60 min with air at 47±0.2°C at a mean air flow rate of 0.75 m3/s reduced the number of surviving puparia that developed from treated eggs and larvae. Initial mean ±SEM fruit center pulp temperature was 22.8 ± O.loC. The temperatures were 38.9 ±0.7,43.3 ± 0.4, and 44.9 ±O.4°Cat 30, 45, and 60 min of heating respectively, when mortalities were 79.2, 98.5, and 100%. Probit analysis of the data estimated the mean fruit center pulp temperature needed to reach 99.9968% (Probit 9) mortality as 44°C (range, 42.4-44.8°C), which required a mean 64.8 min. A large-scale confirmatory test resulted in no survivors based on normal appearing puparia when 214,801 A. suspensa in 3,850 infested carambolas were heated with air at 47 ± 0.2°C at an average air flow rate of 0.75 m3/s until the fruit center pulp temperature reached ~45.5°C. The heating time required to reach ~45.5'C ranged from 90 to 120 min. Initial mean relative humidity was 51%; it increased to =85% at 90 min, and remained there until the confirmatory test was Cornpleted.

Document Type: Research Article

Publication date: February 1, 1992

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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